Alhazen

The duty of the man who investigates the writings of scientists, if learning the truth is his goal, is to make himself an enemy of all that he reads, and, applying his mind to the core and margins of its content, attack it from every side. He should also suspect himself as he performs his critical examination of it, so that he may avoid falling into either prejudice or leniency.

Truth is sought for its own sake. And those who are engaged upon the quest for anything for its own sake are not interested in other things. Finding the truth is difficult, and the road to it is rough.

We will begin by investigating the properties of light, and then we will proceed to investigate the properties of vision, and how vision occurs through light.

The eye is not a source of light, but rather a receiver of light.

Vision occurs when rays of light from the object enter the eye.

The perception of color is due to the different ways in which objects reflect and absorb light.

The perception of depth is due to the convergence of the eyes and the different images received by each eye.

The perception of size is due to the angle subtended by the object at the eye.

The perception of distance is due to the apparent size of the object and the clarity of its features.

The perception of motion is due to the change in the position of the object over time.

The perception of light is a complex process involving both the eye and the brain.

The properties of light can be understood through experimentation and observation.

The scientific method involves observation, experimentation, and logical reasoning.

Mathematics is the language of science.

The universe is governed by laws that can be discovered through reason.

The human mind is capable of understanding the most complex phenomena.

Knowledge is power.

The pursuit of knowledge is a noble endeavor.

The greatest pleasure is to discover the truth.

The world is full of wonders, and it is our duty to explore them.